code: def test_article_example():
      """Source: http://www.prevko.cz/dite/skutecne-pribehy-deti"""
      parser = PlaintextParser.from_string(
          load_resource("articles/prevko_cz_1.txt"), Tokenizer("czech")
      )
      summarizer = LsaSummarizer(Stemmer("czech"))
      summarizer.stop_words = get_stop_words("czech")
  
      sentences = summarizer(parser.document, 20)
      assert len(sentences) == 20
  
file_path: sumy/tests/test_summarizers/test_lsa.py
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  import pytest
  import sumy.summarizers.lsa
  from sumy._compat import to_unicode
  from sumy.nlp.stemmers import Stemmer
  from sumy.nlp.tokenizers import Tokenizer
  from sumy.parsers.plaintext import PlaintextParser
  from sumy.summarizers.lsa import LsaSummarizer
  from sumy.utils import get_stop_words
  from ..utils import build_document, load_resource
label_desc: Use image node_id 7 for calling a global function with example usage: test_article_example() without return types